Physicists experimenting with trans-universal travel have discovered a parallel world where dinosaurs like those of our own planet's prehistory still roam. Although this "Otherworld" has since been colonized by Terrans fleeing an ecologically devastated Earth, it was already home to an indigenous race of human beings collectively called the Otherworlders. Otherworlders are characterized by jet-black skin and yellow eyes but are reproductively compatible with Terrans. Relations between Otherworlders and Terrans vary depending on Terran colonial policy, with some colonies maintaining peace with the natives while others prefer to exploit or even exterminate them.
